/*
 * Copyright © 2012 The Feign Authors (feign@commonhaus.dev)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package feign.optionals;

import static org.assertj.core.api.Assertions.assertThat;

import feign.Feign;
import feign.RequestLine;
import feign.codec.Decoder;
import java.io.IOException;
import java.util.Optional;
import okhttp3.mockwebserver.MockResponse;
import okhttp3.mockwebserver.MockWebServer;
import org.junit.jupiter.api.Test;

class OptionalDecoderTests {

  interface OptionalInterface {
    @RequestLine("GET /")
    Optional<String> getAsOptional();

    @RequestLine("GET /")
    String get();
  }

  @Test
  void simple404OptionalTest() throws IOException, InterruptedException {
    final MockWebServer server = new MockWebServer();
    server.enqueue(new MockResponse().setResponseCode(404));
    server.enqueue(new MockResponse().setBody("foo"));

    final OptionalInterface api =
        Feign.builder()
            .dismiss404()
            .decoder(new OptionalDecoder(new Decoder.Default()))
            .target(OptionalInterface.class, server.url("/").toString());

    assertThat(api.getAsOptional().isPresent()).isFalse();
    assertThat(api.getAsOptional()).contains("foo");
  }

  @Test
  void simple204OptionalTest() throws IOException, InterruptedException {
    final MockWebServer server = new MockWebServer();
    server.enqueue(new MockResponse().setResponseCode(204));

    final OptionalInterface api =
        Feign.builder()
            .decoder(new OptionalDecoder(new Decoder.Default()))
            .target(OptionalInterface.class, server.url("/").toString());

    assertThat(api.getAsOptional().isPresent()).isFalse();
  }

  @Test
  void test200WithOptionalString() throws IOException, InterruptedException {
    final MockWebServer server = new MockWebServer();
    server.enqueue(new MockResponse().setResponseCode(200).setBody("foo"));

    final OptionalInterface api =
        Feign.builder()
            .decoder(new OptionalDecoder(new Decoder.Default()))
            .target(OptionalInterface.class, server.url("/").toString());

    Optional<String> response = api.getAsOptional();

    assertThat(response).isPresent();
    assertThat(response).isEqualTo(Optional.of("foo"));
  }

  @Test
  void test200WhenResponseBodyIsNull() throws IOException, InterruptedException {
    final MockWebServer server = new MockWebServer();
    server.enqueue(new MockResponse().setResponseCode(200));

    final OptionalInterface api =
        Feign.builder()
            .decoder(new OptionalDecoder(((response, type) -> null)))
            .target(OptionalInterface.class, server.url("/").toString());

    assertThat(api.getAsOptional().isPresent()).isFalse();
  }

  @Test
  void test200WhenDecodingNoOptional() throws IOException, InterruptedException {
    final MockWebServer server = new MockWebServer();
    server.enqueue(new MockResponse().setResponseCode(200).setBody("foo"));

    final OptionalInterface api =
        Feign.builder()
            .decoder(new OptionalDecoder(new Decoder.Default()))
            .target(OptionalInterface.class, server.url("/").toString());

    assertThat(api.get()).isEqualTo("foo");
  }
}
